Edge binding for coconut-fiber mats



Feb. 14, 1928. 1,659,141

G. A. GRUPP 4 EDGE BINDING FOR COCONUT FIER MATS Filed June 21, 1926Patented Feb. 14, 1928.

UNITED STATES PATENT OFFICE.

GOTTLIEB ALBERT GRUPP, or HEUBACH, GERMANY;

EDGE BINDING FOR COCONUT-FIBER MATS.

Application filed .Tune 21, 1925, Serial No. 117,488, and in GermanirSeptember 25, 1925.

The present invention relates to an edge binding for woven and plaitedmats such for example as coconut iber mats of the kind used as doormats, mats for gymnasiums 5 and the like. Mats of this kind aremanufactured by weaving or plaiting, and the edge binding at the ends ofthe mats is formed by stopping back or drawing into the inatthe warpthreads which project at each end of the mat. This edge binding causestherei'ore a loss of about l5 to 20 om. on all the warp threads of eachmat as they serve merely to bind the mat and furthermore the drawing inof the binding warp threads is a particularly wearisome and time wastingoperation. The greatest disadvantage of this edge binding as hithertoemployed is however that it is by no means durable. On the contrary itworks loose as $0 a rule even after a short time so that the weftthreads lose their hold and the mat quickly becomes useless. f

The present invention consists in an edge binding formed 'from aU-shaped metal clamp, which is a'ixed to the ends of the mat to beprotected by riveting. The clamp is provided on both limbs with inwardlyand rearwardly pointing teeth, which enter the mat and securely clampthe strands. It may be conveniently made of steel so as to prevent itsbending.

According to this invention the metal clamp may also be provided with a.loop or eyelet for hanging the mat up and with revolving handles whichhave hitherto been wanting on mats of this kind or could only be plaitedon to the mat with diculty.

The advantages of the new edge binding are that in the manufacture ofthe mats it is no longer necessary to leave long warp threads protrudingat the ends of the mat. On the contrary the mats may be woven in theform of an uninterrupted or continuous band and simply be cut ontherefrom in the desired lengths. Neither a loss of warp threads nor anyinterruption in the work of weaving is therefore caused. The applicationoit' the metal clamps to the mat is considerably more simple `than theproduction of the edge binding by drawing in the ends. of the warpthreads as hitherto practised. y

The ready punched and bent clamps are drawn over the ends of the mat tobe protected and pressed down on the mat in a press, the rivet holespunched through and `edges bound by metal clamps according to thepresent invention, Figure 2 is a plan view of a clamp opened out flat,

Figure 3 shows the clamp in cross section as applied to a pile mat andFigure 4 is a perspective view of the clamp.

The new edge binding consists of a U- shaped metal clamp a, the limbs ofwhich are provided with inwardly bent teeth turned inwards and backwardstowards the bottom of the clamp. These clamps are pushed on to the endof the coco-fiber mat c and closed by the pressure of a press, wherebythe teeth Z) of the clamp penetrate into the mat so that the warpthreads CZ and the weft threads e are firmly gripped or clamped betweenthe teeth. Rivets f prevent the clamp from springing open and connect itfirmly to the mat. To enable the clamps to lit properly smooth edges la,must be woven at both ends of pile mats.

The clamps may also be provided with Y eyelets z' for hanging the mat upor with handles 7c pivoted to the mat. This latter provision isparticularly necessary for mats for gymnasiums in which case the mat mayapplied to the underside of the mat longitudinally or diagonally and beattached to the two binding clamps and secured between them say byrivets to the mat itself.

As is plainly shown, particularly in Figs. 2 and 4, each of the teeth Z9has a mat-penetrating portion in the kform of a slender,

`be strengthened by hoop iron which may be the met, and said clamphaving teeth provided at its lnouth, which `teeth have mat penetatingpoi-tions in the forni of slender, needle-like points, and are gradually:1nd increasingly widened toward their bases, so

that the edges of the `teeth ure curved to pro-` vide co1d1eeeiyi1igspaces between adjacent teeth.

In testimony whereof I affix my signa- 20 ture.

G'OTTLIEB ALBERT GRUPP.

